Do a lot of sports. When I looked at the nutrition of cyclists, I was surprised that they eat 2-3 times more than ordinary people. But they drive 100-150 km every day and burn energy. You can eat a lot and spend a lot of energy every day.
I see sports have already been forgotten ... And by the way, this is the best way to lose weight, and you don't have to limit yourself to fatty high-calorie foods.
You just need to run (SYSTEMATICALLY) a couple of kilometers a day.
The main methods have already been named - more vegetables and lean meat. They have fewer calories. For example, at lunch you can eat a pound of boiled or grilled chicken breasts and nothing will happen to you.
There are also foods (mainly vegetables, such as cabbage, celery) that have a so-called negative calorie content - the body spends more energy on their digestion than they contain.
To understand how much you can eat, you just need to install an application on your phone to track your diet. For example, MyFitnessPal